Hack-saw frame



L. E. PECK HACK SAW FRAME Nov. 17, 1925- Filed Feb. 19, 1925 lllllulkwll lal. II, I r! mvlulli \IrLII M NN Patented Nov. 17, 1925.

UNITED STATES? PATENT OFFICE.

LOUIS E. PECK. OF GREENFIELD, MASSACHUSETTS, ASSIGNOR TO THE THREADWELL TOOL COMPANY, OF GREENFIELD, MASSACHUSETTS, A CORPORATION OF MASSA- GHUSETTS.

HACK-SAW FRAME.

Application filed February 19, 1925. Serial No. 10,377.

To r/ZZ whom it may concern: I

Be it known that I, LOUIS E. Peon, a citizen of the United States, residing at Greenfield. in the county of Franklin and State of Massachusetts. have inventeda new and useful Hack-Saw Frame, of which the following is a specification.

The principal objects of this invention are to provide a hack saw frame of comparatively simple construction and of such form that the number of parts of the frame is reduced to a minimum; to construct the frame so that the greater strength is where it is needed at a point near the handle. thus invcreasin the ri idit of the frame and reducing the tendency to bend, and also to re duce the cost of manufacture.

invention and shown tion will appear hereinafter. 1

Reference is to be had to the accompanying drawings, in which Fig. 1 is a side viewof a hack saw with a frame constructed 1 in accordance: with this partly in longitudinal section;

Fig. 2 is a plan of the handle end of the frame;

Fig. 3 is a rear end vie of the handle; i i

Fig. 4 is a side view of one end of the tele scoping element of the frame; i

Fig. 5 is a view of the upper part of the locking or latch member;

Fig. 6 is a plan thereof;

Fig. 7 is a view of the adjustable saw blade connection; and

Fig. 8 is a transverse section thereof on the line 8-8 of Fig. 1.

I have shown the invention as applied to a construction having a wooden handle 10 which is slit down at the top to provide a longitudinal slit 11 all along the topanol which is extended down at the two sides to form extensions 13 separated from each other by a central tongue 14 of wood integral with the handle. Into this slit I insert the rear end of a doubled over sheet metal bar 12 and secure it by rivets 15. These rivets are located in the slot extensions 13 and they also pass through the tongue 14. Thus the doubled over bar is firmly secured between the wooden surfaces on both sides when the rivets are secured in position. This doubled over bar extends forward only a short distance and constitutes a very strong of the upper part adjusted position.

and rigid part of the frame located at the handle end and extending forward from it onlv a little way. j

The telescoping is secured by providing a bar 17 which is of such size and shape as to slip into the U-shaped bar 12 at the top thereof and be received between its upper surface and the top of the tongue 14. These parts constitute the guide for the telescoping bar which has notches 19 in the lower edge. The saw blade is supported at its extreme end by a support 18 which is of well known construction and need not b described in detail.

The end of the saw blade nearest the handle is supported by a locking or latch member 20. This is pivoted on a stud or rivet 21 supported at both ends by the U- shaped bar 12 near the lower edge thereof and at a short distance in front of the handle. The latch member has a projecting arm 22 having a rounded projection 23 at its forwardly from notches 19 to lock the sliding bar 17 in any Thislatch member 20 extendsdownwardly and is provided with a fastening loop 24 having a square passage therethrough in which is received a square slide 25 having a. pin 26 for holding the saw blade. The slide has a screw thread inside extendinglongi tudinally, into which extends a screw 27 having a knurled head 28 thereon. This screw adjusts the slide as may be desired and it is a substantial improvement over the ordinary screw adjustments on the market because the screwthread is entirely concealed within the slide. Therefore it is not exposed to the weather and is not likely to rust. Furthermore, the ordinary screws used in this place are square and have screw threads merely on their four corners which are not of full strength. This one gives considerable additional strength. When the saw is not in place this slide is free to move in its slot, being held against dislodgment from one end by the neck of the head 28. It also provides a, smooth head against which the knuckles of the user are not likely to be injured. in the operation of the saw.

The opera-tion of the device will be ob vious. In order to change the length of the handle the piece 20 is swung on its pivot, as indicated in dotted lines in Fig. 1 to unlock it and then any desired adjustment can be made when the saw blade is not in place. The swinging of the member 20 to the full line position and the tightening up of the saw blade effectually, locks the parts so that they cannot get loose in operation. It is a very strong and simple construction and considerable saving of metal. and metal working operations is accomplished by its use.

Although I have illustrated and described only a single form of the invention, I am aware of the fact that modifications can be made therein by any person skilled in the art withoutdeparting from the scope of the invention as expressed in the claims. Therefore I do not wish 'tobe limited to the details herein shown and described but What I do claim-is a 1. In a hack-saw frame, the combination with a handle a U-shaped bar fixed directly in the handle and projecting therefrom and having a pivot pinnear its extreme end, and 'a single bar constituting the end of the frame telescoplng in the U-shaped bar and adapted to be adjusted along the same and provided .with a series of notches along its :lower edge, of a locking member pivot-ed on said pivot pin and having a projection adapted to enter one ofsaid lnotch es so that ,the bars cannot be moved longitudinally with vrespect to each other anclprovided with means for holding one end of the saw blade. 2. As an article of manufacture, a two piece hack-saw frame consisting of a pair of bars, one of them telescoping into the other, a handle in which one'bar is firmly secured,the other bar constituting the saw blade.

3. In a hack-saw frame, the combination of a bar constituting a part-of the frame,

a handle rigidly fixed thereto,.an end member having a horizontal top part sliding alongthe bar and having notches along its lower edge, and a locking member pivoted to, and projecting down from, the bottom of the bar and having a projection adapted to enter said notches to provideadjustment and having means at the bottom for attaching a saw blade.

4. In a hack-saw frame, the combination of a bar constituting a part of the frame, an end piece at the handle end having a horizontal top part located along the bar and pivoted to it and projecting down from the bottom of the bar and having an opening at'the bottom, and a slide having a pin for holding the end of the saw blade located in said opening.

5. In a hack-saw frame, the combination of a bar constituting a part of the frame, an end piece having a horizontal top part, located along the bar and pivoted to it and projecting down from the bottom of the bar and having an opening at the bottom, a slide having a pin for holding the end of the saw blade and located in said opening, and a screw screwing into the slide longitudinally for adjusting it and concealed in said slide and said opening.

6. In a hack-saw frame, the combination with a handle having a groove in the top, of a U-shaped bar constituting a part of the frame located and fitting in said groove, anend piece having a horizontal top part located in the interior of the U-shaped bar and pivoted to it and projecting down from the bottom of the U-shaped bar and having a square opening at the bottom a slide having a pin for holding the end of the saw blade and located 111 said opening, and a screw having a round head screwing into the slide longitudinally for adjusting it.

In testimony whereof have hereunto aflixed my signature.

LOUIS E. PE'CK. 

